Well, I can't exactly examine the words you mentioned, or this person. If this person really listened and heard correctly, or if it was only their perception that the priest or the police made a mistake, I don't know. Therefore, I cannot speak about this concrete case. I cannot examine whether it truly happened that way or whether it was a misperception on this person's part.
Even if it happened as you described, the host from the tabernacle is the Lord. And even if the host was not consecrated due to an involuntary error by the priest, but the Precious Blood was consecrated, the Church teaches that, in such a case, though I think this did not happen, the sacramental sacrifice still requires a double consecration. According to the dogmatic teaching of the Church, the double consecration constitutes the essence of the Sacrifice of the Mass, because it symbolizes the separation of the Blood from the Body, thus representing the moment of the Lord’s sacrifice.
But I think this person should not feel obliged to go to another Mass. It was not their fault. He or she participated in Sunday worship. Attending Mass on Sunday is not a divine commandment, it is a commandment of the Church. The divine commandment is to sanctify Sunday. The way we fulfill that by hearing or assisting at Mass is ecclesiastical.
So in this case, the person fulfilled their Sunday obligation, of course, and was not in sin. There is no need to repeat by going to another Mass, because it was not his or her guilt.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!